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First staging of two laser accelerators.

W D Kimura1, A van Steenbergen, M Babzien

  • 1STI Optronics, Inc., Bellevue, Washington 98004, USA. wkimura@stioptronics.com

Physical Review Letters
|May 1, 2001
PubMed
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Scientists demonstrated staging for two laser-driven electron accelerators, a key advance for practical accelerators. This experiment used serial inverse free electron lasers to coherently enhance electron beams.

Area of Science:

  • Physics
  • Accelerator Physics
  • Laser-driven accelerators

Background:

  • Laser-driven accelerators offer a potential path to compact and high-performance particle acceleration.
  • Previous research has explored single-stage laser accelerators, but serial staging remained a challenge.

Purpose of the Study:

  • To demonstrate the staging of two distinct laser accelerators acting on an electron beam in a coherently cumulative manner.
  • To validate the feasibility of serial inverse free electron lasers (IFEL) for enhanced electron acceleration.

Main Methods:

  • A proof-of-principle experiment was conducted using a CO2 laser split into two beams.
  • Two inverse free electron lasers (IFEL) were employed in series, separated by 2.3 meters.
  • Electron bunching was achieved in the first IFEL, with rephasing in the second IFEL.

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Main Results:

  • Successful staging of two laser-driven electron accelerators was demonstrated for the first time.
  • Coherent cumulative effects on the electron beam were observed.
  • Electrons were bunched into approximately 3 fs microbunches and rephased with the laser wave.

Conclusions:

  • The experimental demonstration represents a significant step towards practical laser-driven electron accelerators.
  • Serial staging of IFELs is a viable method for enhancing electron beam properties.
  • This work paves the way for future development of more powerful and compact accelerators.